Fuel preheater for internal-combustion engines



Aug/21, 1923. 145x785 W` C. RODAVBUSH ET AL FUEL PREHEATER FOR INTERNAL COMBUSTION ENG'INES 2 Sheets-Sheet l Filed March 3, 1920 W. C. RODABUSH ET AL FUEL PREHEATER Eo INTERNAL coMBusTIoN ENGINES Filed March 5, 1920*- 2 Shoots-Sheet 2 14m/Zamw la, der

1e and the gasoline tube 15. This tube is located in the manifold adjacent thewater heated. tubes therein and is therefore heated by the water delivered to the manifold, as explained. From the manifold, the tube indicated as 16 leads to the gasoline tank or hole `therein toiit over the carbureter,j

of bolts 18 extendingthrough the `frame `19k or may be cast integral or soldered'or otheI'.- 9

wise secured in position. -This electric heater comprises the `frame 19, having the `and contains a number of staggered supporting porcelain posts 21, carried by ther bus-bar 22 .and suitablyv insulated, as at 23, from the frame.

bus-bar is. provided withra terminal 25 and insulated wire 26 leadingv therefrom to the this 'electric heateris grounded at the manifold.

, In; Figure', vwe have shown, diagrammatieally, the electric lightingfand starting Vcircuit in which V'our electric heater is included. `The battery is diagrammatically V'indicated at 2.7, grounded to the frame at -28 and having theY lead. 29-to the self-starter 30. The electric .heating device diagram- '.matically shown Yat 31 is grounded as at 32 and'has the lead 26 leading to a switch 33 shown in open position. When the switch 33 is closed, the Vresistance 31-is energized.'

' In operation-'this switch may bey closed,

particularly :inlcold weather, justbefore or simultaneouslyV with the startingv of the! engine, so that the mixture flowing Vfrom the `carbureter through 34E-'will pass the resist-V ant wiresand become heated upon entering the' intake manifold. As stated, the 'elec-v tric heater isarranged between the carbureter andthe manifold. v

The operation ofthe apparatus is obvious from the foregoing. described, we are enabled'to vtake advantage of the thermostatic control of the water circulating system explained. The thermostatic pumps operate to circulate thewater only through tliewater jacketsy of the cylin- Y dei' head and the vwater tubes of the manilows the water to go to'y the radiator. The

"pumps, the small' amount of water is circu-` lated'merely` throughV the pumps, the tubes fold when the Vengine is cold. v When the engine is warmer, the thermostatic pump alplurality of watertubes provide large heating surfaces, not only for the carburetedV mixture,.but forthe liquid fuel being delivered to the carbureter; and -when, `by means of the thermostat-ically controlled Resistant wire24 is coiled' around and supported by the posts 21. l:The i By the construction i vfluid fuel andthe carbureted ymixture areV quickly heated. Through the construction described, we are enabled vto save a large vpercentage of the fuel which would otherwise"v be needed in starting and in running the engine in cold weather.

`l/Vliat we claim is 1. lA manifold for an internal combustion engine having an inlet for the combustible mixture and an outlet for delivering the mixture to the engine cylinder, a'carbuieter in communication withl the inlet of the niani-r fold, means interiorly of the'manilfold for heating the mixture from theV carbureter, a: feed pipe for fluid fuel leading to the carbureter 'from a source of supply through the said-.heated manifold, wherebytheiiuid mixture delivered to rthemanifold is heatedV therein bythe sainemeanswhich heats the fluid fuel delivered tothe carbureter. .Y

v2. -A= manifold Yfor ani-nternal combustion `engine vhaving an'inlet vfor the combustion -mixture and an outletfor delivering Athe mixtureto the engine cylinder, a carbureter 'in communication with theinlet of the manif fold,4 an electric' heater interposed lbetween thecarbureter andthe inlet'of the manifold, and va :plurality of `horizontal transverse staggered Awaterlh'eatedQtubes in the inaniinixture.Y f Y A manifold forf'aninternal 'combustionfengine comprising means for delivering the combustible mixture tothe engine cylinlder,'anelectric heater interposed between the 'carbureter' and the inlet-of the 'mani-105 fold, a water ac-ket surrounding the manifold and a pluralityof transverse tubes conthrough the manifold.

4. A manifold for'aninternal combustion engine having .an inlet and an outlet for theV lcombustible mixture, a carbureter, an electric heater interposed between 1the carbureter and the manifold, a water jacket surrounding the manifold, andI a plurality of transverse staggered water passages Vconnected to the jacket `and'Y extending through the manifold and adapted to cause azig-Zag passage of the mixture through the manifold.

In testimonywhereof, we aflix' our signatures hereto. y

AFebruary 26th,l1920.

VVALTERClR-ODABUSH. Februar-yes, i920.A

. 'I FRED SCHLUETER.

*fold in thelpatlioftravel of 'the jombustible` yll() 

